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Document Type |
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Thesis |
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Document Title |
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Evaluation of the Effect of some Selected Insecticides Against Aedes ægypti , the Dengue Fever Vector in Jeddah Province تقييم تأثير بعض المبيدات المختارة ضد بعوضة الأيديس إيجيبتاي ، الناقل لحمى الضنك في محافظة جدة |
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Subject |
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Faculty of Sciences |
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Document Language |
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Arabic |
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Abstract |
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The current study introduced supportive evidences about two main goals : The first was the feasibility of adding the larvicides Natural® ( Spinosad 7.48 DT ) , TAB 60® (Diflubenzuron 6% DT) , and VectoBac® WDG (Bti) , as environmentally friendly products , to the array of chemical larvicides implemented within the integrated dengue mosquito vector control systems ,based on their high performance during testing against the larvae of the mosquito Aedes ægypti .The second goal was to throw some light on some important taxonomic characters that are used to identify different stages of the mosquito Aedes ægypti , in addition to photographing the egg stage using the Scanning Electron Microscope . This subject may provide quick guidelines helping researchers and workers involved in mosquito control and research projects to identify the vector easily. About the first , Aedes ægypti larvae from Jeddah strain and ( an internationally known susceptible reference Malaysian strain) VCRU, were challenged against different concentrations of the selected larvicides under laboratory and simulated-field conditions. All susceptibility tests were performed in the Dengue Mosquito Experimental Station (DMES), KAU. The results of susceptibility tests of Jeddah strain larvae were compared with that of the reference strain, VCRU. Based on larval LC50 mean values after 24 hrs exposure period, it was concluded that the tested larvae from both strains were almost equally susceptible to the three larvicides and the tested larvicides were highly efficient against both strains. No sign of resistance was shown .Based on larval ( LC50 ) mean values after 24 hrs exposure period under simulated-field conditions ,the optimum field application dosages were selected for each larvicide. For the second , the main identifying characters of each stage of the mosquito Aedes ægypti were applied using some Mosquito Systematics' literature . Illustrating photographs with brief comments were also shown . Ae. ægypti eggs were photographed using a Scanning Electron Microscope in the Electron Microscope Unit , Department of Biological Sciences , Faculty of Science, KAU. Important characteristics of the egg's chorion were described and utilized for confirming identification . Details of the micropylar apparatus and outer chorion were given : The prominent and continuous micropylar collar clearly differentiated Ae. ægypti . Also the hexagonal outer chorionic cells with large tubercles surrounded by small ones were obvious taxonomic characteristics for this species. Linear dimensions of the egg were determined. and showed agreeing with previous literature .This part of the study may be used as quick guidelines to help researchers easily identify the different stages of the vector mosquito. |
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Supervisor |
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dr.Ahmad I. Assaggaff |
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Thesis Type |
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Doctorate Thesis |
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Publishing Year |
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1432 AH
2011 AD |
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Added Date |
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Saturday, June 4, 2011 |
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Researchers
| طه محمد خليل | KHALEL, Taha Mohammad | Researcher | Doctorate | |
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